If the buzz is mains-hum, there’s an Audacity plugin to reduce it …
https://plugins.audacityteam.org/nyquist-plugins/effect-plugins/filters-and-eq#hum-remover
If it’s USB whine, there’s another Audacity plugin to reduce it: MosquitoKiller4.
If the buzz is mains-hum, there’s an Audacity plugin to reduce it …
https://plugins.audacityteam.org/nyquist-plugins/effect-plugins/filters-and-eq#hum-remover
If it’s USB whine, there’s another Audacity plugin to reduce it: MosquitoKiller4.